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Chapter 12 Description of Parameter SettingsC2000 Plus

12.2-45

 Load operation adjustment

8. Operation test with load

B1. Low-frequency loading capacity test

a. If the low-frequency loading performance is low, increase Pr.10-31 (I/F mode, current

command) and Pr.10-58 (mutual inductance compensation gain).

b. If the low-frequency loading speed presents large plummet, or the output frequency

presents low-frequency vibration, adjust Pr.11-03 (ASR1 low-speed bandwidth) and

Pr.10-33 (PM FOC sensorless speed estimator bandwidth). Increase the setting to

improve the response when the speed drops too much at transient load. Decrease the

setting if the frequency presents an extreme vibration at stable load.

B2. High frequency loading capacity test

a. If the high frequency loading performance is insufficient, increase Pr.10-55 (Magnetic

flux linkage estimate high-speed gain) and Pr.10-56 (Kp of phase-locked loop).

b. If there is large plummet of loading speed, or the output frequency vibrates, adjust Pr.11-

04 (ASR2 high-speed bandwidth), Pr.10-55 (magnetic flux linkage estimate high-speed

gain) and Pr.10-56 (Kp of phase-locked loop). Increase the setting to improve the

response when the speed drops too much at transient load. Decrease the setting if the

frequency presents an extreme vibration at stable load.

B3. Operation frequency exceeds the rated frequency

a. When there is a waveform of speed and current in the flux-weakening zone, and an oc

or ov fault occurs during the deceleration, adjust Pr.01-51 (flux-weakening overload stall

prevention time) and Pr.10-31 (I/F mode current command).

 SynRM Sensorless adjustment parameters

Refer to Section 12-1 Description of Parameter Settings for more details

Parameter Description Unit Default Settings

00-10 Control mode 0 0–2

00-11 Speed control mode 0 0–8

00-17 Carrier frequency kHz 4 4–8

01-51 Flux-weakening overload stall prevention time Sec. 1.00 0.00–600.00

05-00 Motor parameter auto-tuning 0 0–13

05-33

Induction motor (IM) or permanent magnet

synchronous AC motor (PM) selection

3 0–3

05-34

Full-load current for a permanent magnet